烟叶中的重金属含量是由其产生的土壤带入的，而不是在生产加工过程中人为添加。
Metal content in tobacco leaf primarily is driven by the metal content of the soil in which it is grown, rather than resulting from processing.27.
生长在重金属污染土壤中的植物通过积累游离脯氨酸和降低抗坏血酸含量等途径来减轻重金属的毒害。
The plants growed in the soil polluted with heavy metals could alleviate the heavy metal poison by accumulation of proline and reduction of antiscorbutic acid content and so on.
通过对试验区内玉米、小麦和土壤中重金属含量的研究，分析比较了作物对重金属的富集能力和健康风险。
Through the study of concentration of heavy metal in farmland from the city epigenetic irrigated area, the difference of their ability of beneficiation and health risks were analyzed and compared.
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